The details: ???Constructed in Japan from vintage spade print indigo dyed cotton, the Lofgren for HR Engineers Shirt is based on a 1920???s Railroad Engineers uniform with details including whistle pocket and button hole for whistle chain, scoop hem with triangular gussets, chin strap collar, triple stitch yoke and sideseams and vintage hexagon bakerlite buttons.??? Limited to just 50 pieces, the